| Ni-Mn-Ga-RE(RE=Tb,Sm)合金的马氏体相变和磁感生应变 |
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| 引用本文： | 郭世海,张羊换,赵增祺,李健靓,王新林.Ni-Mn-Ga-RE(RE=Tb,Sm)合金的马氏体相变和磁感生应变[J].中国稀土学报,2003,21(6):668-671. |
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| 作者姓名： | 郭世海 张羊换 赵增祺 李健靓 王新林 |
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| 作者单位： | 1. 钢铁研究总院功能材料所,北京,100081
2. 包头稀土研究院,内蒙古,包头,014010 |
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| 基金项目： | 国家863计划新材料领域项目(2001AA327022) |
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| 摘 要： | 研究了Ni48Mn33Ga19合金添加微量稀土元素Tb和Sm后，对合金的马氏体相变、磁感生应变及机械抗弯性能的影响。结果发现，微量稀土元素Tb和Sm的掺人，降低了合金的马氏体相变温度和居里温度，但晶粒显著细化，使合金的抗弯强度显著提高，具有良好的塑韧性；同时，使合金的磁感生应变值有一定下降。
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| 关 键 词： | 金属材料 Ni-Mn-Ga合金 马氏体相变 磁感生应变 形状记忆合金 稀土 机械抗弯性能 |
| 文章编号： | 1000-4343(2003)06-0668-04 |
| 修稿时间： | 2003年5月21日 |
Martensitic Transformation and Magnetic-Field-Induced Strain in Ni-Mn-Ga-RE(RE=Tb,Sm) Alloys |
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| Guo Shihai.Martensitic Transformation and Magnetic-Field-Induced Strain in Ni-Mn-Ga-RE(RE=Tb,Sm) Alloys[J].Journal of the Chinese Rare Earth Society,2003,21(6):668-671. |
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| Authors: | Guo Shihai |
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| Institution: | Guo Shihai~ |
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| Abstract: | The effects of microamount additions of RE (Tb, Sm) on the martensitic transition, the magnetic-field-induced strain and the bending strength of highly textured polycrystalline Ni_(48)Mn_(33)Ga_(19) alloy were investigated. The experimental results show that the addition of RE elements decreases the martensitic transformation temperature and the Curie temperature. But the bending strength of Ni-Mn-Ga-RE (RE=Tb, Sm) alloys increases remarkably because of grain refinement. As a result, Ni-Mn-Ga-RE alloys will be applied practically with higher reliability and stability due to favorable plasticity and toughness. In addition, the replacement of small amounts Ga by Tb or Sm decreases the magnetic-field-induced strain of the alloys at room temperature. |
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| Keywords: | metal materials Ni-Mn-Ga alloy martensitic transformation magnetic-field-induced strain shape memory alloy rare earths |
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